Newly Discovered Molecule Modulates Cartilage Repair Lara C. Pullen, PhD | August 29, 2012 Dr. Pullen is a medical writer based in the Chicago area. Reference 1. Johnson K, Zhu S, Tremblay MS, et al. A stem cell-based approach to cartilage repair. Science. 2012;336:717-721. ad goes here:advert-1ADVERTISEMENT Page: 1 2 | Single Page Share: